The Baht symbol alone Could Cause some Confusion yes, but combine it with the symbol for the Costa Rican Colón and you get;

฿₡

so you could say, please send me ฿₡50.00.  

It is not unheard of to use two or more symbols to represent a currency, for example:

the Nicaraguan Cordobas uses: C$
the Dominican Peso uses: RD$

EDIT: Remember when you could buy a shave and a haircut for "two bits"?  Well that day may soon come again.